Donbas region to hold referendum on joining Russia: Moscow-backed separatists

Medvedev Says Donbas 'Referendum' Would Strengthen Moscow's Hand

4 separatist regions in Ukraine to vote on joining Russia - Los Angeles Times

War in Donbas - Wikipedia

Russia almost fully in control of Donbas province, now holds 20 percent of Ukraine

Why are parts of Ukraine holding referendums on joining Russia? Here's what you need to know

Luhansk and Donetsk are key to the latest escalation in the Ukraine crisis : NPR

As Ukraine Conflict Intensifies, Serb Volunteers Prepare for Battle

What are the Ukraine 'separatist' regions at the crux of the Russian invasion - ABC News

Four occupied Ukraine regions begin vote on joining Russia, Russia-Ukraine war News